EA actually released an official demo for FIFA 13. The demo size is approximately 450MB–550MB (not 100MB, but close). It includes:
Where to get it: Abandonware sites like OldGamesDownload or MyAbandonware. This is legal because EA no longer sells or supports FIFA 13. fifa 13 highly compressed pc 100mb
Some variants encrypt your "My Documents" folder and demand $50 to unlock your save files from other games. EA actually released an official demo for FIFA 13
You land on a shady website with green "Download Now" buttons. The file you download is: Where to get it: Abandonware sites like OldGamesDownload
One or two underground repackers have created a "Stripped to Core" version. This file is 180MB–250MB (not 100MB). It contains:
Note: Even these versions suffer from constant crashes because the compression breaks asset linking.